/**
 * After Vite and sync-extracted-from-dist:
 * 1) Writes dist/qwb-builtin-embed.js (EM fallback).
 * 2) Injects built site + manifest into dist/index.html as JSON (base64) so
 *    WEBSITE publish can read them from the live document — no fetch() of
 *    site.html / manifest.json (often 404/503 in the Hub for non-entry files).
 *
 * Must run *after* sync, which copies dist/dev.html → dist/index.html.
 */
import { readFileSync, writeFileSync, existsSync, copyFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';

const __dir = dirname(fileURLToPath(import.meta.url));
const root = join(__dir, '..');
const dist = join(root, 'dist');
const sitePath = join(dist, 'site.html');
const manPath = join(dist, 'manifest.json');
const indexPath = join(dist, 'index.html');
const outPath = join(dist, 'qwb-builtin-embed.js');

if (!existsSync(sitePath) || !existsSync(manPath)) {
  console.warn(
    'emit-builtin-embed: dist/site.html or dist/manifest.json missing — run vite build first. Skipping.',
  );
  process.exit(0);
}

const site = readFileSync(sitePath, 'utf8');
const man = readFileSync(manPath, 'utf8');
const siteB64 = Buffer.from(site, 'utf8').toString('base64');
const manB64 = Buffer.from(man, 'utf8').toString('base64');
const payload = JSON.stringify({ siteB64, manB64 });

// Optional ESM fallback (some hosts block arbitrary sibling files; index inject is primary)
const esm =
  '// auto-generated from dist/site.html + dist/manifest.json; do not edit\n' +
  'export const BUILTIN_SITE_HTML = ' +
  JSON.stringify(site) +
  ';\n' +
  'export const BUILTIN_MANIFEST = ' +
  JSON.stringify(man) +
  ';\n';
writeFileSync(outPath, esm, 'utf8');
console.log('Wrote', outPath);

if (!existsSync(indexPath)) {
  console.warn('emit-builtin-embed: dist/index.html missing — cannot inject. Run sync-extracted first.');
  process.exit(0);
}

let html = readFileSync(indexPath, 'utf8');
html = html.replace(/<script type="application\/json" id="qwb-builtin-data"[\s\S]*?<\/script>\s*/gi, '');
const tag = `\n  <script type="application/json" id="qwb-builtin-data">${payload}</script>\n`;
if (/<\/body>/i.test(html)) {
  html = html.replace(/<\/body>/i, tag + '  </body>');
} else {
  html = html + tag;
}
writeFileSync(indexPath, html, 'utf8');
console.log('Injected qwb-builtin-data into', indexPath);

copyFileSync(indexPath, join(root, 'index.html'));
copyFileSync(indexPath, join(root, 'index.hub.html'));
console.log('Updated project index.html and index.hub.html');

const extractedIndex = join(root, 'extracted', 'index.html');
if (existsSync(extractedIndex)) {
  copyFileSync(indexPath, extractedIndex);
  console.log('Updated extracted/index.html');
}